package com.jian8.netty.http;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.http.FullHttpRequest;
import io.netty.handler.codec.http.HttpObjectAggregator;
import io.netty.handler.codec.http.HttpRequestDecoder;
import io.netty.handler.codec.http.HttpResponseEncoder;

/**
 * @author wu
 * @create 2021-06-03-14:18
 */
public class HttpServer {
    private final int port;

    public HttpServer(int port) {
        this.port = port;
    }

    public static void main(String[] args) throws Exception {
        args = new String[]{
                "8080"
        };
        if (args.length != 1) {
            System.err.println(
                    "Usage: " + HttpServer.class.getSimpleName() +
                            " <port>");
            return;
        }
        int port = Integer.parseInt(args[0]);
        new HttpServer(port).start();
    }

    public void start() throws Exception {
        ServerBootstrap b = new ServerBootstrap();
        NioEventLoopGroup group = new NioEventLoopGroup();
        b.group(group)
                .channel(NioServerSocketChannel.class)
                .childHandler(new ChannelInitializer() {
                    @Override
                    protected void initChannel(Channel ch) throws Exception {
                        System.out.println("initChannel ch:" + ch);
                        ch.pipeline().addLast("decoder", new HttpRequestDecoder())   // 1
                                .addLast("encoder", new HttpResponseEncoder())
                                .addLast("aggregator", new HttpObjectAggregator(512 * 1024)) // 3
                                .addLast("handler", new HttpHandler<FullHttpRequest>());
                    }


                })
                .option(ChannelOption.SO_BACKLOG, 128) // determining the number of connections queued
                .childOption(ChannelOption.SO_KEEPALIVE, Boolean.TRUE);

        b.bind(port).sync();
    }
}
